257 Roberts & 257 Roberts +PRifle Cartridge

Abbreviated Name: 257 Rob / 257 Rob +P

TECHNICAL INFORMATION:

+P = This ammunition is loaded to a higher pressure, as indicated by the +P marking on the case headstamp, to achieve higher velocity. Use only in firearms especially designed for this cartridge and so recommended by the manufacturer.

The 257 Roberts is one of two .25 caliber cartridges used for daily production testing in the Nosler Ballistics Lab. Either the 100 gr. Ballistic Tip, 100 gr. Partition, or the 110 gr. AccuBond would be our pick for deer-sized game. IMR 4350 is an excellent powder for our hunting weight bullets. For varmints, our 85 grain Ballistic Tip works very well with faster powders such as RL15 and H380.